Date of Award:
Master of Science (MS)
Nutrition, Dietetics, and Food Sciences
Department name when degree awarded
Gary H. Richardson
Compatibility of mixed cultures of Streptococcus lactis and Streptococcus cremoris we e studied by the phage tracer technique in 10% nonfat dry milk and a whey-based phage inhibitory medium. Methods of membrane dialysis and differential enumeration were tried and abandoned. Dominance occurred in nonfat dry milk and in the whey-based medium during a continuous fermentation period within a pH range 6.8 to 5.2. The dominance pattern of two-strain combinations in 10% nonfat dry milk was different from that in the whey-based media. Dominance varied from one strain to another in no consistent sequence in some combinations. Dominance patterns of combinations were compared with patterns of stimulation and inhibition.
Searle, Clinton K., "Comparison of Compatibility of Streptococcus Starters in Reconstituted Nonfat Dry Milk and a Whey-Based Bacteriophage Inhibitory Medium" (1975). All Graduate Theses and Dissertations. 5155.